How many people are contact traced?published at 14:12 British Summer Time 1 July 2020
Reality Check
Labour leader Keir Starmer said three quarters of people with Covid-19 are not being reached by test and trace teams, external.
He said that there were 22,000 weekly cases in England but only 5,000 were asked to provide details.
But his first number is drawn from a survey.
Each week the Office for National Statistics tests a sample of people and then forms an estimate for the population as a whole based on the percentage who are positive.
It is an estimate and not people who have actually been tested, so therefore the teams could not trace that many people.
In reality, the latest week in the figures (11-17 June) saw 6,100 people actually test positive for coronavirus.
Of these, the government was able to reach 4,869 people.